Rekensommen met erbij en eraf tot 100
In de mix
1.
40
20
+
=
2.
20
10
+
=
3.
40
20
–
=
4.
100
60
–
=
5.
60
20
–
=
6.
20
20
+
=
7.
60
40
–
=
8.
40
10
+
=
9.
20
20
+
=
10.
50
10
+
=
11.
20
10
+
=
12.
20
10
+
=
13.
50
30
–
=
14.
20
10
+
=
15.
10
10
+
=
16.
40
50
+
=
17.
10
10
+
=
18.
100
30
–
=
19.
90
80
–
=
20.
30
20
+
=
21.
70
20
–
=
22.
80
30
–
=
23.
40
50
+
=
24.
100
70
–
=